If they are the INTENS tubes, then they are not "just" Gen2+ WP units, but the next iteration of Photonis' technology after XR5. They have some advantages over unfilmed L3, but lose in the lowest light.
The 4G min spec all these new tubes must fit into (a bit of mixed info in the EU vs US):
US:
1 - Bandwidth response from 400nm to 1100nm
2 - FOM above 1800
3 - Minimum 57 lp/mm resolution in all lighting conditions
4 - Halo size smaller than 0.9mm (0.7 typical)
EU:
1 - An Extended Bandwidth of photon collection to deliver a consistently high image quality in all environments (from below 400nm to above 1.000nm)
2 - A FOM (figure of merit being Signal to Noise Ratio times the Resolution : SNR* R) above 1.800
3 - A Resolution always superior to 57 lp/mm even in the most polluted light environments such as urban areas or when entering a building where the light is suddenly switched on
4 - A Halo size never larger than 0.7mm around the brightest objects seen in the image to provide the highest details around the light sources
When these were first being sold in the US there was some confusion about the halo size, and I am not sure how it is today, but then it was said the larger halo spec was for weapon mountable variants, though pretty much every Photonis tube handles min 500G shock versus min 75G with US Gen3 aviation tubes. A halo size of over 1.0mm is, or at least was not long ago, recommended with Gen3 for weapon mounting.
So in a nutshell they are different than L3 unfilmed tubes, but perform thereabouts the same if the specs are the comparable. They see illumination that Gen3 doesn't and usually have a smaller halo and a less scintillating picture.
UNV made great comparison videos.
Low light:
Photonis Intens 4G vs. L3 Gen 3 Filmless - Low Light Comparison
High light:
Photonis Intens 4G vs. L3 Gen 3 Filmless - High Light Comparison