RE: ThunderTiger E325 or T-Rex 450
I have the Trex 450 SA version which has some head plastic parts which break easily in a hard crash, most of them are cheap and the better part is that they are already available in my LHS, they also sell some TT helis and parts but most of them have to be ordered.
I have had two mishaps with my Trex since new and I have had it repaired the same day that I visited the LHS that is very convenient to me so I will stay with my Trex for a while.
If I had to buy any of both again I would make a visit to the LHS and see what they are carrying and the availability of parts, then I could make a decision.
I use to fly my Trex almost daily at the end of my work day or at the bed time of my kids so I consider that parts availability are a must. I can not imagine waiting for a whole week to fly my Trex.
Do not trust blindly on marketing but as some guys here have mentioned both helis are almost the same in performance and will provide many hours of fun and distraction so any choice won’t be wrong.