LM139: LM139ADR and LM139ADRG4

Tool/software:

Hello Good morning !

LM139ADR and LM139ADRG4 are exact same parts , previously TI used G4 to denote to the part as green compliant (RoHS+ Halogen Free) but now both parts green compliant (RoHS+ Halogen Free). However when i check the unit price in Digikey, it is different . They are quoting $2.32000 for LM139ADR  and $4.32000 for LM139ADRG4. If these parts are same then why there is difference in cost ?

https://www.ti.com/lit/ml/slyb236/slyb236.pdf?ts=1734343857623&ref_url=https%253A%252F%252Fwww.google.com%252F#:~:text=Historically%2C%20G4%20and%20E4%20suffixes,had%20a%20consistent%20orderable%20part

Kind Regards,

Jithin E