Celestron C90 or Skymax 102

Hi everyone!, my idea is to have a "grab n´go" telescope, something small that I can transport in a backpack and pair it with an small tripod...

5 years ago I sold my 8" dob, which I still regret, but since I moved, I had to sell it... :(

Now I want to retake this beautiful hobby but starting with something I can move, via plane, bus...on a backpack..

I can´t decide between the Celestron C90, which looks robust and the Skywatcher skymax 102...

Differences:

C90 comes with a 45° diag and the Skymax 90° diag.

102 means more apperture, but would that be a huge difference vs C90?

Not sure if the 45° angle of the C90 is useless for astronomy what do you think?

Would the 102 withstand traveling in a backpack and the "no extra care" handling?

The idea would be using a Celestron humminbird tripod...

Thanks a lot everyone!