I'm going to run the team tournament of 60 games Noomen Matches(against each engine).
Or How about this instead?
Let Alessandro and Michael pick 5 engines of their choice from the my list of 10 equal strength engines?
(3 Engines actually,they must choose Kiwi,Twisted)
More Engines,50 games.
(each engine play 50 games)
OR
How about Hamsters/Kiwi vs Romichess/Twisted Logic
Less Engines,120 games.
(Each engine play 120 games)
Short cut to avoid writing two different engines unlike Alessandro, Michael has found the partner Edsel who supports Romichess , Romi is much relieved of having had the support from the good blitzer Twisted Logic.
Twisted Logic and Kiwi are almost same in strength and about Hamsters and Romi... I will let you decide