I recently viewed a youtube video where someone did a comparison between these two shortwave UV lamps and based on the video the difference seems very noticeable indeed.
I have the older version of the UV lamp at the first link and at the time I bought it it was a 6 watt unit (current version listed as 11 watts), and while it does okay for viewing my currently small collection of fluorescent minerals, I still wish I had that other brand of shortwave UV lamp at the 2nd link below, though it likely was not even available way back when I bought the one I did.
https://www.ultraviolet-tools.com/ultraviolet-lamps-/enhanced-11-watt-shortwave-midwave-longwave-uv-lamp.html
The one at the link below was shown in that comparison video as being much more effective in lighting up fluorescent minerals even at a further distance
https://www.midnightminerals.com/product-page/wtc-the-triple-5w
I just wanted anyone considering buying a shortwave UV lamp to be aware of the differences in effectiveness that comparison video showed, but ultimately the decision is yours to make so do your own online research to be sure first before buying.
EDIT TO ADD:
IMPORTANT UPDATE:
I just did an online search to find that comparison video and discovered the maker of that video made a "Part 2" of that video using better batteries in the UV Tools model from the first link and to be fair he said with the better batteries the difference was much less, maybe only about 10% and near the end of the Part 2 video below he said he thinks that if someone uses even better batteries than he used the results between the two will be the same.
Part of the video description of Part 2 includes:
"In this part, the comparison is made using nickel metal hydride batteries with uvtools lamp instead of energizer's alkalines, It is clear the NIMH batteries provide notably better results, enhanced markedly the illumination and bridged the gap between the two lamps far less than in previous comparison." (end of quote)
.....so I might see about getting NIMH "D" batteries for my UV Tools shortwave lamp to see the difference for myself.
(just checked Amazon and as of now looks like I can get a 4 pack of NIMH rechargeable "D" batteries for about $23, the UV Tools lamp uses 3 "D" batteries)
Here is his Part 2 comparison video:
I just wanted to add this new info I just discovered in the interest of being fair and including all info that can factor into a buyer's decision.