Let's be fair here, no one can ever really say that any penlight is 100% the same as the one used in the show, mainly due to the fact that they just didn't keep records like that back then and we only have a few scenes to go by, that said the one Straker and Mooneye found - the Ever Ready - is the best match to those screen caps that I have seen, especially when it comes but the bulb tip screen shots. I also recall one fan on here mentioning that he had asked Frazier Hines what color the end cap of the sonic was and Frazier had said it was blue, so it seems like this penlight matches in that respect as well. Now, I have noted for a while now that the activation button in the War Games screen caps looks silver to me, possibly rounded as well and I seem to recall a member from a flashlight forum mentioning that this body type of penlight was made by a few manufacturers at the time, it was sort of like a K car in that respect. So it's plausible that the one Pat used is identical to the Ever Ready with the exception of that button and it is also plausible that that button looking silver is just a trick of the light. But I'd lean more towards the former to be honest.
All that being said, it seems to match in all but that one detail - at least from what I can see from a couple of screen caps - which is an easily replaced detail as well. And like I said, given that they didn't archive props like they do now, we may never know the truth. No one can say with any certainty what the real one was. Personally, I'm very happy with this one and and I feel DEC copied the Ever Ready perfectly. One day I may swap out the top button to match what I personally see in the screen caps but for now I'm extremely happy with this replica as it is and there just isn't a better match out there for this prop yet.
So long answer longer lol, there is no 100% certainty. It's up to you if you feel it's close enough or the same type. I think it matches all but one detail that I see and others think it matches all. I'm sure others think its not close enough. In the end, the choice is yours. Sorry if that didn't help you decide HA! I tried to be helpful anyway.