The twin engine vs single engine issue is a perennial argument.
I remember posting a link on another thread about it a while ago. The thrust of which (you see what I did there?!) was that the USAF had conducted a study of aircraft losses due to engine failure between F15 and F16. Guess which had more losses? Answer: F15.
The reason given is that if an engine were to fail catastrophically it will most likely destroy the other engine and probably the airframe with it. Two engines means twice the chance of failure.
In this day and age, engine reliability is so good (and the F35 engine is a serious bit of kit) that statistics will show that you can rely sufficiently on one engine to keep you safe.
Typhoon is an awesome aircraft in every respect and is getting better all the time. F35 is also an awesome aircraft but their roles are subtly different. If I were a student at Valley I would be delighted to be sent to either aircraft. As things stand right now though, given a choice I would take F35 purely because it’s the new kid on the block.
BV