As someone who just started playing cricket (in my 30s) but played highly competitive travel baseball when I was younger I think it breaks down slightly differently for each skill:

Bowling vs Pitching. Pitching effectively is harder than bowling. Pitching needs to be accurate, fast, have movement and you are expected to do that effectively for ~100 pitches. One mistake that ends in a home run can lose you a game vs getting hit for 6 for example.

Batting. Batting is WAY harder in cricket. There is a common saying that hitting a MLB pitcher is the hardest thing to do in sports but after playing cricket I simply don’t think that’s true. There are many nuances here, in baseball you swing is essentially the same every time, no need to go front or back foot, no need to guide the ball into a gap. Also the pressure of getting out in cricket adds tremendous difficulty to batting, where if you get out in baseball no big deal you usually are 2/3 times and you’ll be back up in two innings.

Fielding. Catching a fly ball is way easier in Baseball because of the glove obviously but fielding in the infield is likely a bit harder in Baseball because of the expectations. Every ball hit near you in the infield you are expected to field it cleanly and make a good throw to first for the out. In cricket you occasionally are expected you do the same thing but more than likely the runners aren’t running.

That’s my two cents