Yeah the H100i pipes are pretty thick/inflexible, which I didn't realize when purchasing. My constraints were that I needed 1) a warranty that would cover damage to other system parts if the AIO leaks, and 2) either no RGB or RGB that can be turned off (or nearly off) -- this PC is in a tiny studio apartment (hence SFF) and needs to be sleep-compatible, so the H100i v2 seemed to fit that. More so, Sergii recommended the H100i to use with this case (which I now see is probably not a great idea).And yeah, the h100i is not a friendly aio for most sff builds due to those horrible hoses the use. Even guys using the 18L Cerberus cuss them. The silverstone td series, while at a few degrees disadvantage have way more flexible,smaller hoses that help fit. Also they do have some slim series as well to help mitigate the tight dimensions.
In the US, the Asetek patent situation means these AIOs all have nearly the same Asetek block/pump, and most seem to have very similar radiators (and given that I got my own fans, I didn't really care about the AIO's stock fans). But the Cooler Master's LEDs can't be turned off, the EVGA didn't work with AMD Ryzen until a few months ago, and others (e.g. SilverStone) seemed to lack a decent warranty, hence either the Corsair H100i v2 or the NZXT Kraken X52. The X52 was twice the price of the H100i v2, so opted for the Corsair.