Both of those watches are solid picks for your budget and running style. I'd lean toward whichever has the interface you prefer since the actual pace and HR accuracy between them is pretty comparable - both are reliable enough for someone doing 3-4 runs a week. The main thing is testing the fit before you commit. I grabbed a watch last year that looked perfect on paper, but the band was just slightly loose on my wrist, and the heart rate numbers were all over the place during runs. Tightened it down and suddenly the data made sense.
The sensor fit thing matters more than most people realize. You want it snug enough that it doesn't shift, but not cutting off circulation - if your wrist goes numb during a run, it's too tight and you're not getting real data anyway. Some folks have wrists that just don't play well with optical sensors no matter what, so if you find the watch reading your HR all weird and erratic even when fitted properly, that's when a chest strap becomes worth the extra hassle.
One thing worth checking: how much do you actually care about the software side? If you just want to see your pace splits and average HR after a run, either watch does that. But if you're planning to get into structured training plans, recovery metrics, or syncing with apps down the line, that's where the choice matters more. Take a few minutes to look at the companion apps on your phone before buying - that's where you'll spend most of your time.