Tap and hold pop-up menu? If you mean the options to edit an icon or widget, just lock the desktop and you don't get that without unlocking. If you mean something else, please explain - I'm using Nova and have been experimenting to try to work out what you mean before posting, and can't find anything else that fits this description (unlike Apex, which can give me a menu when I tap and hold the desktop).
TBH I'm not really bothered about launcher themes: these only affect desktop and app drawer, and as I can handle my own desktop and don't like a distracting app drawer background that really comes down to icon packs for me, which both support (I find a different font in the app drawer and system menus a bit jarring, so don't care much about a launcher supporting fonts, and if I did I'd prefer them to be something I could set separately rather than them having to be included in a theme). So for me personally the differences there aren't a big deal.
Anyway, for me the two are extremely similar. Apex development paused for a couple of years, which is probably the main reason I switched to using Nova exclusively, but I have it back on my phone as an alternative launcher now (I used to use one to play with alternative desktop setups while using the other for day-to-day work, occasionally swapping the default over).