Bright enough for super-selective grammar but prefer comp

[Mymadworld]

DS is yr5 and we've started working together at home with a view to taking 11+ next September. It's school open evenings this week but so far of the 2 grammars we've seen, neither have wowed us that much so we're now wondering whether 11+ prep is worthwhile. Unfortunately the only other grammar option is the one I know very little about and doesn't hold open days until next summer.
Our eldest dc is at the comp (if you can call it that in a grammar area ) and we've been really pleased with both his progress and the school as a whole but he's far less academic/motivated than his sibling and I can't shake the feeling that I'd be doing dc2 a disservice by not sending him to a grammar.
Any thoughts or experiences?

Your DC is ?grammar school, so you expect them to be a higher prior attainer.

Half the school you show are high attainers. This would have equated to level 5s in the old y6 SATs.
98% of these pass their English & Maths. Attainment 8 is 65.6 Progress 8 is 0.76.

You 'don't care' how well a comp does with low/middle achievers because you don't expect your DC to be one of them, so filtering on high achievers only helps you to compare better with grammars.

Though note that grammars might start with higher level higher achievers (e.g. over 115 in new SATs rather than just over 110s).

You're a gem @TeenTimesTwo I've never know how to read these league tables before thank you. As predicted the regular grammar has no low prior strainers and only a couple of middle but interestingly lower progress 8 score for high strainers ( 0.13).

I think my research here confirms my gut instinct so don't dismiss grammar yet but if he doesn't end up going to a SS (either by choice or by score) then send him with his sibling to the comp as results seem comparable and it's a much nicer environment with better facilities.!

Generally grammar schools will have less money than non grammars and budgets are tight these days so I’m not surprised the comp has better facilities.

The thing that jumps out to me from those figures are that a very high proportion of the students at the comp are high prior attainers. So it's not an area where all of them are being creamed off by the grammars and there's a good chance that the comp is used to catering for people that are "11+ material"

Those figures for your comp are very good indeed. I'd be happy to send my child there!

It means that their results are comparable with any leafy comp like the ones here in much of Hampshire

Sorry to hijack this thread but can anyone help me to understand this set of results? I've got no idea and you all seem to understand it! Thanks!

Its a medium sized comp that achieves just above average with most of its kids, focuses on traditional subjects and does not make the kids do too many subjects

Top line - cohort size and split between achievers shows comp
Percentage entering ebacc shows subject mix
Progress 8 scores are positive showing decent progress

Thanks!