Welcome to the router forum.
I only have 7 routers:
2 X Triton (deliberate choice)
2 x Makita (2nd one bought for repairs to 1st one) (both operational)
2 X Ozito (just happened to be available at the right time)
1 x Ryobi,
I would say that the same brand/model is not necessary as you will buy the second router to fill a niche in your woodworking. For this reason, you would research and buy the best router to fill that niche eg. a table mounted router will require different characteristics to a small hand held router. You will want to buy a plunge router and that may not be available with some US brands?
I have found not having the on/off switch on the handle does not cause any problems.
Just learn to handle the router with safety.
I don't mind if other members disagree with my comments.
I don't profess to know everything, and I may learn something new.
"Never attribute to malice that which is adequately explained by stupidity."