I can try and help, although I'm assuming you are talking about drawing tablets without screens:
> Which Wacom tablet should I get?
It doesn't have to be wacom, there are lots of options - Huion and XP-Pen come to mind as two low cost ($20+) examples, to get your feet wet in the wordle of tablets, although there are lots of other companies as well
> Would an iPad be a better choice for note taking?
Depends on how you like your notes - an iPad is about as portable as a graphics tablet, so it's mostly personal preference and cost here
> How do Wacom and iPad compare hardware wise?
In terms of horizontal/vertical resolution: you probably don't need to worry about it, it'll be fine as long as your tablet is well matched in size to your screen (I quite like 8" diagonal or similar for a 24" screen, scaling up and down from there? personal preference though)
Both will do the basics of pressure sensitivity (any number of levels of sensitivity above 1024 is probably indistinguishable unless you are serious about it, ignore the marketing) and tablets will support tilt from a fairly low price. The main difference is that graphics tablets support 'hovering' the pen above the tablet to show the cursor on the screen, although this is not necessary on an iPad where the image is directly underneath.
The "pen display" is the type where it's a monitor with the transparent trackpad overlaid on it. That, I think, is what you want. I tried the other type, where you write on the tablet but you look at the screen elsewhere, and it was not fun.
The Wacom One is a fine choice (its their smallest and least expensive model). Maybe artists would need a larger one, but the Wacom One is, IMO, large enough to take notes on.
Haven't tried an iPad, but that Wacom is a really excellent writing/drawing experience.
> Which Wacom tablet should I get? It doesn't have to be wacom, there are lots of options - Huion and XP-Pen come to mind as two low cost ($20+) examples, to get your feet wet in the wordle of tablets, although there are lots of other companies as well
> Would an iPad be a better choice for note taking? Depends on how you like your notes - an iPad is about as portable as a graphics tablet, so it's mostly personal preference and cost here
> How do Wacom and iPad compare hardware wise?
In terms of horizontal/vertical resolution: you probably don't need to worry about it, it'll be fine as long as your tablet is well matched in size to your screen (I quite like 8" diagonal or similar for a 24" screen, scaling up and down from there? personal preference though)
Both will do the basics of pressure sensitivity (any number of levels of sensitivity above 1024 is probably indistinguishable unless you are serious about it, ignore the marketing) and tablets will support tilt from a fairly low price. The main difference is that graphics tablets support 'hovering' the pen above the tablet to show the cursor on the screen, although this is not necessary on an iPad where the image is directly underneath.