I have both of those guns. The blue EuroPro HE 1.5mm EUROHE105 is a Quality satajet RP copy gun, if you want a very Fast gun with very good atomization but a little more very fine mist overspray. If you have not bought a gun yet I would personally get the EVO 1.8mm (superior gun body quality 93ish on jackxchange) very versatile, a lot of different nozzle cap sets fit the gun and chrome is more durable. The EVO can be used for epoxy primer with the 1.8 tip, or a sprayit sp-33000 lvlp 1.3mm w-400 copy gun (50ish) if you do not need a tip for primer and cost is an issue.
Fit either of these with a warwick 1.4mm 409H HVLP nozzle and cap set for around $50 at johnsonautobodysupply. Sprays way better than the evo or spray it (the evo sprays too slow to be efficient at an overall with a 1.4mm IMO and its a better spot/blending or panel gun). The 904H hvlp Sprays more like a medium speed RP gun with very low overspray like LVLP. The engineering quality is unbelievable for the low cost and precision in manufacturing their needle nozzle cap sets. The nozzle of the warwick 904 is identical to the w-400 nozzle, the LVLP cap is very similar to the w400lv2 air cap, and the HVLP cap is the same but has an additional ring around the nozzle of air jet holes to effectively Double atomize the paint and only uses an additional 3ish cfm 7cfm vs 10cfm I believe accomplishes something similar to what the Iwata 400 series LV guns do using a different design.
The above gun bodies are all Iwata 400 series copys and fit perfectly with any w400 or lph400 needle nozzle cap sets, yes I have collected them all lol. If you go with the evo the needle fits an Iwata 1.3-1.6mm nozzle as does the warwick 904H needle. So all that is needed is the cap and nozzle which can be found on e-bay used at times. Or Alternatively a complete warwick 904H costs 125ish. I just like the lighter weight, balance, longer trigger pull, and overall egronomic feel of the astro followed closely by the sp-33000lvlp better than the warwick. as far as quality of gun body parts it goes astro, then warwick, followed by the sprayit lvlp IMO. rebuild kits are about $6-7 for the warwich though if you want or need to rebuild it. Also the w400 looking copy needle nozzle cap sets of the Sp-3300 lvlp are on amazon for $18 and go from 1.3 up to 2.0mm for primer, the nozzles and needles are OK but the air cap quality is inconsistent best for primer IMO. The 1.7mm Sp-33000 nozzle its the perfect size for the w-400-lv2, and the warwick 904 air caps though.