Hareta's manga is better than Adventures/SPE DP manga
As for what I remember for RS...
RS Manga marked the beginning of humans hyper prioritized over Pokemon. Sapphire's weird savagery (no not meme callousness, I mean feral) got dropped extremely quickly (admittedly it was weird), and she pretty much gets no development afterwards. Ruby on the flip is fairly interesting in NOT being likeable unlike most game based protags, and the reasoning on him hating to battle was fine.
Wally is interesting, he got respirators to aid his asthma after recuperating, and his purpose on finding Rayquaza showed his skill. Though it's weird he's given more dev than May
I like that the writer had bias for Team Aqua. Having him control media coverage to doubly screw Team Magma was great, and surprisingly well thought out. It was also nice seeing the reporters be the ones to stop the corruption, instead of the kid protags
Didn't care too much for Magma's Tabitha and Courtney, though the latter got some weird shipping going on with Ruby in some fanart
However as I said, the priority on human rep meant Pokemon personality and dev got sidelined. This was even lampshaded by Norman later in his fight with Ruby, on how Swampert was more aware of the danger of the situation despite being dismissed by Ruby. Sadly Swampert was the only mon that arc to have a noted personality besides Feebas and Plusle/Minun, and even that was barely shown outside the beginning when they met, and the Norman fight.
I remember Werster saying the anime focuses a lot more on representing the Pokemon compared to Adventures, and I have to agree. After Gen 3, Adventures kind of stopped caring, while the anime still at least tries to hype and individualize mons
RS's attempt of having Celebi for Mirage Island was lame, and "them being away from everyone for 21 days" after the Kyogre/Groudon showdown is absurd. This also is kind of shows another issue Adventures had: it really shouldn't have piled on everything to be in the same continuity. It made remakes even weirder to adapt, and the roster bloat got really bad later
I enjoyed it, but it really should've been the end. FRLG's arc I didn't even finish and got bored by despite Deoxys
Darn, how did the Treecko survive this!? Does your Mudkip have a bad Nature or what?
Tombstoner in my hack is physical, and this Mudkip was special based, so...