Can you take actual photos of your unit in action, and compare it against your other Velleman DSOs?
I think beauty needs to take second spot to functionality, and safety. Velleman at least designs some safety into the scopes inputs, many of the low cost ones seem like they have none.
Velleman does say explicitly it is designed for CAT II voltage use, although I don't think it has officially been listed by UL, TUV or any such safety agency for CAT II usage. Its uses a less clear bicolor LCD, say versus the color DSO Nano, but Velleman has better and more reliable specs, more in competition with a 6MHz Uni-T handheld scope. Velleman's reputation is a bit more established for low cost hand held DSOs, there are very few players in this field. Velleman's DSO have been around for ~ 10 years, and they seem just be reusing their scope modules and making tiny incremental improvements. After reading the user's manual and watching the videos, is pretty much my scope, except for some feature changes.
I own an HPS40, its my 'sacrificial' scope and one I take around, the one I'll reach for first when testing an unknown fault with potential voltages that could fry my 1052e, after my DMM says its ok. I like the form factor of 140i better than the bigger HPS40. Th 140i lacks USB or old style serial port connections to ease getting screen dumps of waveforms. Nothing your cellphone or a digital camera can't handle though, particularly in macro mode ,to get details.
The HPS40 uses 5 removable batteries, NiMH or alkaline, so its more flexible with power supply and charging. But 5 cells is a bit odd as replacement packs typically are often multiples of 2. Its easy to make a AAA NiMH pack, but its less convenient to replace as the 40.
The 140i insulating sleeve could probably be both ergonomic and safety, the HPS40 plastic case is luckily not slippery but has no other layer of insulation.
The 140i has a smaller screen, but it has tighter pixels. So it show the same data as the large HPS40 screen.
If I brick my 40, I'll replace it with the 140i, its cheaper, and otherwise identical. See mikes electric stuff's test newer in the thread, he found sync issues above 1 MHz.
FWIW, there is a chinese look alike, pictured left, of the Velleman HPS40, on the right. I didn't think these scopes were very popular, but I guess the design is successful enough for someone to spend effort to make a look-a-like.