Due to mostly to not yet having tooled up anything for tenor, it's not so easy to answer. I imagine they will be close, but maybe not as close as a a YAS62 is to a YTS 62 but then who has actually analysed that anyways. You can't just expand an alto to make it tenor pitch, for a start the neck is different. Plus if you scaled up an alto to a tenor, and subsequently again to a baritone, the keytouches would be too far apart.
As for the body, yes that will be kind of a scaled up version, I'll try to get some more data but without giving away necessary "trade secrets"
BUT, one exception may be when there is a soprano. My intention is to model it off my very own Buescher True Tone so yes , this will not be matched in anyway apart from being the best darnedest saxophone money can buy.
But then I think you'll find the Selmer MKVI soprano was still based off the body of much earlier (Super or Cigar or even model 26 I believe) while the MKVI altos and tenors were a new design, albeit very close to SBA.
Somebody correct me if I'm wrong.
Also think about keywork, I am making the ergos nice for me but also hoping it will be nice for people with both smaller and larger hands. Sounds impossible eh? But I have specified some changes to the pinky table. I don't like tilting tables so neither will have a tilting table but I've been looking into making the G# less wide (ie across the smaller dimension of the oval) but then countering that with making it longer so that it doesn't disfavour the larger pinky. So some trial and error is involved. But what this does mean I hope is that without inconveniencing the larger pinky it makes reaching the low Bb easier for the smaller pinky.
So the tenor will not just be a scaled up version of that - ideally I think it would be the same located in the same place relative to pinky.