To the original comment, as others have said, the Fiesta is unique in the fact that the ST w/ Recaros and the ST w/out Recaros both have the same Sync 3 infotainment system in the US, while Europe has different trim levels like the Focus ST does. The Focus ST, on the other hand, has three trim levels - ST1, ST2, and ST3. The ST2 and ST3 come with Sync 3 in 2016 models and MyFord Touch in 2015 and older models, and the ST1 comes with the standard non-touchscreen Sync system with the tiny 4" screen and is all around pretty crappy (I had an ST1 Focus for a bit).
So yeah, no need to get the Recaros if you hate them just to get Sync 3 on the Fiesta. That said, the non-Recaro seats in the Focus ST have more bolstering and support than the non-Recaro seats in the Fiesta, so you will definitely not be as gripped and locked in should you go the standard seat route with the FiST.
Touching on what you said about performance... The Focus is faster, but it is also 500lbs more (roughly) and isn't as fast as it should be for its specs in my opinion. The FiST doesn't have the raw grunt, but it is way noticeably lighter and that makes it feel faster than it is so you don't feel like you're driving a dog slow car (unless you're used to 12 second cars that do 0-60 in 3.5 seconds of course). Also, hard specs from professionals put the 0-60 on the FoST at 5.9-6.5 sec and the same professionals claim 6.5-7.1 on the FiST in their tests so it isn't like we're comparing a Prius and a Ferrari... the FoST is really just a tiny bit faster than the FiST in the end when it comes to 0-60 and a part of that boils down to the fact that you can hit 60 in 2nd in the FoST and you have to bang 3rd to get it in the Fiesta. For the 1/4 mile, I've seen pros claim 14.3-14.8 for the FoST and 14.8-15.1 for the FiST, so again, not exactly insane differences. Talking stock here, not getting into mod ceilings.
Also, in the 4 months I owned it, the FoST had this very, very unusual sense of being super cramped inside while still feeling like you were driving a huge car. Even though it is a bigger car than the FiST I never felt like I had a ton of room inside yet the car still felt heavy and big at the same time. I'm not going to say it didn't have its merits and that it wasn't ever fun to drive or that it didn't handle well, but to me the FiST is far and away the better driver's car and does everything better minus cargo room, rear leg room, and is a bit off on the straight line speed. Oh, I also did like the steering wheel better in the FoST, but the one in the FiST isn't too shabby either.
So yeah, no need to get the Recaros if you hate them just to get Sync 3 on the Fiesta. That said, the non-Recaro seats in the Focus ST have more bolstering and support than the non-Recaro seats in the Fiesta, so you will definitely not be as gripped and locked in should you go the standard seat route with the FiST.
Touching on what you said about performance... The Focus is faster, but it is also 500lbs more (roughly) and isn't as fast as it should be for its specs in my opinion. The FiST doesn't have the raw grunt, but it is way noticeably lighter and that makes it feel faster than it is so you don't feel like you're driving a dog slow car (unless you're used to 12 second cars that do 0-60 in 3.5 seconds of course). Also, hard specs from professionals put the 0-60 on the FoST at 5.9-6.5 sec and the same professionals claim 6.5-7.1 on the FiST in their tests so it isn't like we're comparing a Prius and a Ferrari... the FoST is really just a tiny bit faster than the FiST in the end when it comes to 0-60 and a part of that boils down to the fact that you can hit 60 in 2nd in the FoST and you have to bang 3rd to get it in the Fiesta. For the 1/4 mile, I've seen pros claim 14.3-14.8 for the FoST and 14.8-15.1 for the FiST, so again, not exactly insane differences. Talking stock here, not getting into mod ceilings.
Also, in the 4 months I owned it, the FoST had this very, very unusual sense of being super cramped inside while still feeling like you were driving a huge car. Even though it is a bigger car than the FiST I never felt like I had a ton of room inside yet the car still felt heavy and big at the same time. I'm not going to say it didn't have its merits and that it wasn't ever fun to drive or that it didn't handle well, but to me the FiST is far and away the better driver's car and does everything better minus cargo room, rear leg room, and is a bit off on the straight line speed. Oh, I also did like the steering wheel better in the FoST, but the one in the FiST isn't too shabby either.