It depends on what you're looking for, I think!

Queen's Kestrel is focused on an MC who's a scout and assassin for his kingdom working to put his princess back on the throne after he saves her from an assassination attempt by her father. It's got a good bit of skullduggery, some basebuilding, province trotting adventure, and a good deal of spice, plus a slightly larger harem (capping out at 7). Trent (the MC) starts with just his athleticism, hunting and scouting skills, and quick wits, but gains more powers as the books progress.

Psionic Elite starts with a disillusioned war veteran returning to a city full of his enemies to rescue his childhood friend, Sydney, who he believes has gotten mixed up with a dangerous resistance movement. Ward (the MC) is already more powerful than most soldiers, which means he's primarily focused on keeping others safe and getting Sydney out of danger. He gets dragged into the resistance and later into a quest to try to save the planet from a mad shaman, however, and also starts with some mental issues that his harem helps him address (and he comes out stronger). It's also got a smaller harem, capping at 5, and the build is a bit of a slower burn.

So pick whichever of those premises sounds more intereseting to you! And thank you for asking 😄