What to replace a wilkie snaffle with???

[Allegro]

got a new 5yo who is ridden in a wilkie snaffle with a losinge.
Just wondering what dressage legal snaffle is best to change this bit too, without upsetting the horse too much? So eggbut, d rings or loose ring? Any other advice thanks ever so much

 

[LeannePip]

i show my 4yo in a wilkie then when we do dressage i change her into a loose ring snaffle with the same mouthpiece as the wilkie ( thin mouthpiece with a french link) she isnt reliant on the poll pressure so donsn't make a noticable difference although i can tell the difference if that makes sense - if your horse needs a bit of poll pressure try a hanging cheek