Xbox series x vs ps5

Should i buy a new console when i already have one. i have a ps5 but theres a new game which is called starfield and i really wanna play it but it isnt available on ps5. its only available on xbox series x. i really wanna play it. but me n my wife are saving up for a house. i am getting a console new boxed which rrp for 480 but i get it for 380 as a discount. should i get it. i feel a little guilty on spedning the money but i also got 250 from my office as a bonus gift. idk what to do.