Mepro's have a plastic ring around the cells that will never rub off, thus, you always have the white dot. After several cleanings of Triji's, you'll be cursing because the painted rings will be gone.
Both will last for about the same time. If you only spend $100 every 8 plus/minus years on your gun, then you're way ahead!
I've used both, and taken a loss to sell my used triji's and buy mepro's!!!
MEPRO all the way. 10 years/8 guns/0 problems.
Tom
------------------
A "Miss" is the ultimate overpenetration!
You can never be too rich, too skinny, or too well armed!