To answer this question for myself, whether Gen 2 is as good as Gen 3, I went ahead and bought a PVS-14 with Gen 2 Photonis Echo White Phosphor.
I can say that these tubes with higher specs (mine is 67 lp/mm (Res) and 31.01 signal to noise ratio (SNR) work about as good as USA Gen 3. I say about as good because in very, very low light, Gen 3 has a slight advantage with a higher gain. Gen 3 in these conditions provides a slightly brighter image.
I believe that the Photonis Echo will work great for most recreational/hobbyist users. If the price is the same between a Gen 2 Echo and a Gen 3 Harris or L3, I'd recommend Gen 3 for the best all around performance low-to-high light. Where the Echo white phosphor has an advantage is as a lower priced WP option compared to the more expensive L3 or Harris thin filmed or filmless.
The cost savings I've seen that JRH Enterprises is offering for a set of binocular-goggles with Echo WP is $1-$2k less than with Gen 3 WP.
My past opinions of Gen 2 being inferior to Gen 3 were 90% wrong. I say 90% because it doesn't work as good in extreme low light as Gen 3 which probably only matters to hardcore users such as myself. I recommend if you're shopping for something with Photonis Echo tubes get as high of specs as possible minimum 64 lp/mm and over 30 SNR and you'll really like it.