With only frontal ‘stealth …
+++++
Well that should beat zero stealth. That’s what the Su-35 has: zero stealth. It is a low RC aircraft but but not even clos to to the F-35 in that regard. I can see you but you can’t see me looks an an F-35 advantage impossible to overcome.
with AESA radars old stealth like F-35 and possibly F-22 is of no consequence. The forth coming B-21 could likely remain undetected.