@MrMuppet, not everybody, esp. not retail, understands the lingo used.
Do you mean to open a ShortPut position with a strike that has a delta = -0.25 (-25%) and to open a LongPut with a strike that has a delta = -0.05 (-5%), both together forming a Put Spread?
Can you give one or two practical examples? Or just a theoretical BSM dataset would be helpful too.
Do you mean, for instance, such a BSM data set? :
ShortPut: USpot=100 DTE=182.5 Strike=85 IV=45 --> Pr=5.67 delta=-25
LongPut: USpot=100 DTE=182.5 Strike=40 IV=100 --> Pr=1.96 delta=-0.05
Hmm. doesn't look good, IMO:
https://optioncreator.com/st1pmkl