HSG vs SHG?

BabyK`sMom • IVF miracle born 4/20/17 x2 sweet angel babies 🖤👼🏻👼🏻 🌈 due 3/31/20
I had my HSG done already, having a SHG done next month before my FET. Curious about whether the pain of the SHG is comparable, worse, or not as bad? My HSG was very uncomfortable due to abnormal tubes so is like to be a little more prepared for the SHG if it's going to be painful 😬