Choosing between 2 compressors

[GuuZ]

I've got akmost the same question as boshunter.

I've got:
1) Aspera B1116A
2) L'Unité Hermétique AEZ 3430Y

Both 1/4 HP if I'm correct. The first advise someone gave me was the Aspera. So I used the L'Unité Hermétique in my vac pump. But in my vac pump that one sounded more powerfull. So that;s why I'm here for a second opinion.

[wdrzal]

Do a compression test.;)

[piotres]

Aspera should be a bit more silent than UH :)

[GuuZ]

the Aspera is more silent indeed. But I want to know wich one is most powerfull.. so how do I do a compression test?

[epion2985]

Look at displacement, motor power, and volumetric efficiency.