whats the differences between the 510 801 and 901? pls help
My first PV was a Joye 510, manual battery, which I tried with carts, drip tips, and cartos. I didn't care at all for the carts or the drip tips on the 510 because the 510 atomizers would get too hot to even hold; the cartomizers addressed this problem somewhat satisfactorily. (I understand this has more to do with my "drags" than with the units themselves).
Once I realized I was looking for a "cooler" vape (and for more taste of the e-liquid flavors), I decided to order a 901, manual battery. Instead of the DSE battery, however, I bought the Riva. For my vaping style, the 901 felt like a huge step up. I liked everything about it better (and gave away my 510, as a result). The 901 works great for me whether I'm dripping, using cartridges, or using cartomizers. I enjoy dripping with it. The vape is cooler, and the flavors are more pronounced than what I experienced with the 510.
Curious about the pen style, I ordered a DSE 801, manual battery. I've only had it for a few days, and I really like the atomizer. So far, it's my favorite of the three (the atomizer, not the battery). Vapes are long, cool, flavor- and vapor-filled. I'm not happy with the batteries, since they are both already giving me fits (as in I think I've already lost one of them and perhaps the other as well). But that is probably just a "buyer-beware" story since the place I purchased them is not one of ECF's vendors. It is really hard to find DSE 801 manual batteries at good prices. I guess there's just not much demand.
My experience when comparing the three models is the 510 gives a stronger TH (not something I'm interested at all in) than the 901 or 801. The 510 atty gets really hot. The 901 produces a smoother, cooler vape than the 510. The 801 produces an even smoother and more flavorful vape than the 901. All three produce plenty of vapor for me.
In the end, it's all about personal preference. Who knows... I may pick up a 510 again in a few months and just love it!