Obviously, they are two different guns. I have the first one and I like it a lot. It's not quite as good as my DeVilbiss, but it's a good knock-off and it
gets the job done nicely. (and it's cheap enough that if I screw up on cleaning it I can just throw it away and get a new one) I've used it to paint a number of trailers before selling them and the finish has always been "like new".
The advantage of a HVLP gun is, of course, the low overspray that you get and the thicker paints that you can spray. I don't own one so I cannot comment on their suitability for your application. Since overspray is never a problem for me I'd go with the first one. I like that fact that it can blast paint into tiny cracks and corners, which, for me, is important. I'm not sure if the HVLP could do that.
Also, I cannot stress highly enough the importance of making sure that whichever gun you use, make sure the air coming to your gun is bone dry. Just a few drops of atomized water can (and will) ruin a paint job. Put primary and secondary filters on your compresser. It's cheap money compared to the need to strip and repaint.
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer
1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer
1996 V21 w/1993 200HP Mercury on a Shoreline Trailer
All towed by a 5.7L Hemi Durango.
If God didn't have a purpose for us we wouldn't be here, so
Live simply, Love generously, Care deeply, Speak kindly.
(Leave the rest to God) 
Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
Last edited by Destroyer; 11-04-2010 at 08:50 PM.
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