You can keep the 90mm (the diff is mere 2mm) and get rid of spacers. All city stack might not account for external headset stack. So add stack height of your chosen headset.
Forget about all other dimensions, just stack and reach can determine your reach/bar position.
Yeah. That's what I thought. But this shop keeps nattering on about the TT length, and I'm trying to preach forum wisdom that S&R are king but have now entered the realm of self-doubt.
You can keep the 90mm (the diff is mere 2mm) and get rid of spacers. All city stack might not account for external headset stack. So add stack height of your chosen headset.
Forget about all other dimensions, just stack and reach can determine your reach/bar position.