For me there is only one grease gun.....the Swiss made Wanner. Although no longer manufactured they're considered by many to be the finest grease gun ever made, I have 2 , one which i bought new 55 years ago the 2nd i bought off eBay for £25. One for grease, one for heavyweight oil used on suspension trunnion (Triumph spitfire, well Caterham 7 to be exact)