finally seeing some feats for ultimate Jean! thanks for the scans, it's been so long since I read ultimate x-men. Although correct me if i'm wrong, but the phoenix being a part of her own power evolving was a hoax and it is still a god/cosmic entity in the ultimate universe. in which case, everything you posted aside from the Karen scans and the 616 teen jean scans were Phoenix amped Jean (pls correct me if wrong) so I suppose not applicable to standard ultimate Jean.
This is... complicated. First time we seen Phoenix, it was said it was a part of her psyche. Others like the Shiar cult said she was a god in a little girl body. Neither side was EVER proven wrong and sadly it was never stated who was right and not right. All we know she had the Phoenix powers and never seemed to lost them. Not once did the Phoenix left her and her powers as "Karen" were as impressive as any Pheonix showing outside the city TK manipulation and bringing back the dead. So... its hard to say. No one in this world can show a single feat of Phoenix removed or leaving her. So whether its a different entity (Heavily to be the truth as seen when Frankilin stole the powers for himself) or just her power with another personality, cant say for 100% sure.
Also the scan you posted of ultimate Jean being equal to 616 Jean, yeah that's teen Jean who is really not comparable to adult 616 Jean and who is also way below Emma, so that doesn't help your case. Also later on they say in that arc that 616 teen jean is more powerful than ultimate jean, so again I would not use her comparison to 616 teen jean to make a case ultimate jean.
This is kinda true and kinda false... its complicated too with my knowledge on the subject. Young Jean has better feats of TP and looser morals than her adult self has in current issues. In fact its been stated in sources, I have to re find from past debates, that state she is better as Young Jean now than what she grew into. Though I have to re find those quotes from other debates. Here is one of the debates I read where Teen Jean was owning a non depowered Emma.
Many blame Bendis for the character power levels, but it happen. Teen Jean is a insane powerful telepath with some damn good feats. Ultimate Jean has very little in feats really, and only shines when tapping Phoenix Force in her. Her feats are just better than Emma in high ends with what I posted and matching the raw power of Omega Jean with her non Phoneix mode is proof of Ultimate Jean in relation as far as my comparison goes.
The Karen scans are great though. What issue did this happen in? Would love to check it out.
I could not give you the issues off the top of my head sadly. All my comics are locked up in storage and I have no way outside Readcomiconline to find those issues. Its all pst United We Stand but before Galactus shows up for time frame wise. Kinda crappy X-men run to be honest.