I would say legroom is also a lot tighter in the chim, I was gonna buy one before buying my second E86, I found the driver's side slightly more cramped in the footwell and my 6ft5 son couldn't even get in the passenger side because of the length of his legs lol
Outriggers and underside rot are the other biggest worry and fit and finish are not always the best.
That said if you accept that and want to just own a TVR and absorb the drive and noise, the fit and finish will be the lest of your worries.
I love the Z4 coupe though it's just that long hood and rear end, roof lines it's a pretty car, surely a classic in a few more years