1.d4 Schandorrf repertoire or Wojos weapons Catalan??

I have both series i got them for my birthday and i cant decide which one to use! Im 31 years old and im told im to old to have schandorrf as basis for my repertoire. Im not gonna learn both as im using most of my chessstudytime on endgames

For an adequate answer you'll have to give some more details, i.e. playing strength, style, etc.

well im quite rusty after a long break fomr chess but i suspect i will be around 1800 on chess.com after getting my rust off. about playingstyles, i dont have any. i like all positions. im over 30 years old so maybe im to old to use a repertoire like schandorrf which is very interestning but all very sharp mainlines

i once learned the marshall gambit in the ruy lopez. i learned really well 2 years ago but since then i have only faced it twice so i dont want to learn huge theory on something i will never face

I can tell you, as an owner of both, that I far prefer the Wojo Series.

The fact that you said that you use most of your study time for endgames rather than tactics indicates to me you should probably go with Wojo's Weapons.

i decided to stay with wojos weapons for now

I haven't read Schandorrf's book, but I would find it very hard to believe that it is better than the Wojo's weapons series.

The only thing I may add is that the lines in Wojo's weapons are probably a bit more difficult to play, the Catalan and the Fianchetto KID in particular are quite nuanced. But I think that Ippolito and Hilton make up for it with their excellent explainations.

Schandorff if you want to have fun attacking games, although his slav and semislav lines require a lot of time and effort to learn. Wojo if you want to play longer and quieter games but confuse/frustrate your more aggressive opponents. Personally I like I lot of Schandorffs recommendations.