Hi, I had the same problem like you, deciding which engine I was going to buy.

It was between the RB T10RC and the Novarossi 353 RACE .12/C TUNED, I had a very hard time to decide.

Both engines are reliably and powerful and both are made by Novarossi (RB is made to RB specs)

After talking to drivers in my country (which most of the top drivers run RB T9RC and R3RC and they are very happy with their engine) and surfing the internet to find out which is better, I went for the RB T10RC and I am very happy with it.

It gives me both bottom and top end power for all the track layouts that I have in my country and it's easy to tune and it keeps its constant tune

I know that it is expensive but do the right thing and buy the RB T10RC with the 2659 pipe and it wont let you down, they are able to stand up for temperature abuse (325F) not like other cheap engines do, they die by the middle of the season while running 260F temps.

Better buy once then twice