Abie Danters' Air wins hands-down for me. I've always felt Zierer are onto a winner with the Starshapes (it's just a shame there's not more of them), and Danters' is generally operated brilliantly! (Once you get over the admission price, that is...)
I'm a bit of a scaredy cat when it comes to being in the presence of that thing at the one time of year it comes anywhere near me.... (i'm talking about Winter Wonderland). Do you recommend that this year (providing that AIR is attending) I should 'grow some balls' and pluck up the courage to have a ride?
I rather conveniently spent a few hours riding it earlier today, so the experience is fresh in my mind!
It's honestly not as intense as it looks, and is largely void of the uncomfortable neck-snapping movements found on topscans (which is something you might expect due to the rides' obvious similarities). As with many similar flats, the ride experience can vary dramatically from cycle to cycle. For a ride featuring fewer lateral forces, I suggest an inner seat on your allocated row (it doesn't take a great physicist to explain why, so I'll leave that part blank).
The ride is huge. I'm not going to try and tell you otherwise. But rest assured that it feels sturdy and stable enough; the height should be no major issue for you (provided it's not something that phases you regularly).
Positive g forces don't exist in quite the same volume as you might expect. Certainly to no higher extent than the majority of smaller flats and any decent-sized coaster. Where the appeal lies in a Starshape's cycle is in blissful and long-lasting bouts of freefall, and even some ejector airtime in places. It's hard to visualize from an offride perspective, but the best moments the ride type has to offer is in "falling" from the top of the ride right down to the platform below. It's awesome.
All in all, it's a "fun" ride that isn't necessarily mind-blowingly intense, as it can first appear. Give it a go, I guarantee you'll love it!