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As I understand it Vic has said the lenses are for high bay commercial ops. Or, say for example, an open grow in a 9 foot basement.
To me 2 smaller lights leaves you more flexibility. Like with your Haze cbd and road runner being at different heights. Or if something happens to one light you aren't left with no light while one is getting fixed. Or if you perpetual grow like @Ripper . Or.... you get the idea
The 2 pro 4 is what i would do. I have a 450uvb and a 250 in seperate tents. Youll not regret any amare you pull the trigger on ill tell ya that. But i use the lenses on the 450 sometimes. I have it set at 6 foot ..... the top of my tent. Then if i have a shorter plant i just screw on a lense above it to get the light down to her. With the taller gals i just let them stretch up to where they wanna be with no lenses ...
The 2 pro 4 will give the widest most even coverage of all the options. I positive thats why vic suggested it in the 5x5
But i do hear that owning an Amare pro9 make your unit grow up to 2 inches.... so its a tough choice
Lol! Well most plants under LEDs will need a little extra cal/mag that's for sure. My girls take 7-10ml of cal/mag every feeding under my led light now... I checked out your plants and they look good. And this is not a dig at you by no means so please don't take it that way.. but doing research on grows all over the internet it seems to me the se450 produces better ..idk idk. I could always get the 450 and take the lenses off. I'll be growing 6 plants at a time ..all autos..