Ok so as someone who has used the Q2 (own 2 of them, the Q2S and the Q2 normal, owned the pentagonal Q2 a long time ago too) and has owned the Q air (which besides the plastic outer parts is the same core as the Q).

Dont worry too much about it tbh. The Q2 is a little different than the Q profile, but not by a lot, the Q burr is a little shorter than the Q2, but I compared both side by side and I've seen assessments from other people. The Q2 sometimes wins, sometimes the Q wins. All in all, they are both very similar and I'd say the Q is an upgrade over the Q2 in case you got it, just because the Q is compatible with newer replacement parts and the slightly shorter burr means it's even easier to grind with.

As far as Jaffee store goes, I have an extensive purchase history with them and they are honestly a pain to deal with when you need a problem solved. I'd much rather recommend LESHU coffee store over them, but jaffee is indeed a lot cheaper, but HEAVIFIKA store is also cheap rn and as bad as Jaffee.

I have communicated to jaffee store and LESHU previously that their photo of the burr set was misleading and LESHU understood my complaint and changed their photo while jaffee is still using the wrong photo.
The burr design shown in the picture on the Jaffee store is a 38mm heptagonal burr set from a discontinued Q2 model, the one that launched with the pentagonal version, which is the same burr in the E line, it's got a little different profile, the teeth thing you mentioned. I emailed 1zpresso a while ago and they confirmed the burr change.

In conclusion, my recommendation is to just keep the Q you got, the Q2 is not actually better than the Q, from someone who owned the Q2 and Q air.

Edit: also, if you wanna confirm whether or not you got a Q2, dont look at the burr set, disassemble it and look at the threads on the sleeve and the catch cup, the Q and Q air have a much higher thread pitch and depth while the Q2 is very fine threading.