Perhaps a stupid question about filament

Is there truly a difference between normal PLA, PLA+ / High speed PLA?

I’m still relatively new to FDM printing, albeit I’m figuring things out. When I first got my printer a friend told me there was no difference, and that he got equal speeds across all types.

I was going off that premise and figuring that it was just an issue of tuning my printer properly, but I’m starting to think that’s not actually the case.

I use ORCA slicer, and the flow rate test has always caused me a ton of issues. Beyond a certain speed (in excess of 90mms, I can’t get consistent results. I always end up with issues with the nozzle dragging across filament that hasn’t adhered properly.

But if I show it wayyyy down on the initial layers and don’t exceed the manufacturer’s recommendation, it seems to run fine.

I’ve got the v3 se, which says normal print speed is around 180. Was my friend (and my belief about tuning) wrong, and it really is “180, if the filament says it’s rated for that speed”?

PLA and PLA+ are a little different, the latter being 10C hotter hotend. The V3SE is a little bit of fun for higher speeds, I have had to up the stepper current to 0.75 from 0.6, don’t know how to do that on Marlin as I am a Klipper person now for the higher speeds.

Yeah - I’ve been doing lots of tweaking trying to get the higher speeds going with PLA consistently.

Figured maybe having the filament mounted on the gantry was problematic, so moved that off. Got a filament dryer. Saw there was some sway on the gantry, and that the gantry had a lean - so added some supports to make the gantry perpendicular to the bed/square everything up.

But nothing has improved the print quality like slowing it down…lol

You think tinkering with the power adjustments in klipper/sonic pad might be a worthwhile experiment? Or just buy the higher speed rated filament because that’s all a fools errand?