Found this link with a lot of information on the SWAG 80W:
Vape Shop Online E-Cigarette & E-liquid Best For Sale
Personal opinion:
It is a nice and small device for starting.
SWAG 80W was the second vaping device i bought,started vaping with one of those cheapo pens and after a couple of months i wanted an upgrade so i went for a SWAG 80W.
Me personally if i knew there was an Aegis Solo i would have got that one instead,not that the SWAG 80w is bad but aesthetic wise i prefer the solo but then again im more into rugged looking mods.
If you decide to get the Swag 80w try to take out the battery and the cover of said battery once you finish putting a new coil and cotton in your atty.
Not that there is a problem but if sometimes my atty leaked i liked to have it all clean so once i had the atty primed and ready i would remove it from the Swag 80w,unscrew the battery cover and remove the battery.
Then i would just clean around the battery port so it would be nice and clean,doesn't take long and it's good for the health of your mod.
Also when dropping the battery in the hole try to do it vertically,i mean just line it up and pop in,if you have the battery inclined the ridges where the cap goes might scratch the plastic cover of the battery.
Apart from that i can't say much,never tried the Aegis so i can't comment but im guessing performance wise it won't be much of a difference so in this case i would say just go for the looks,size difference isnt that much anyway.
good luck