It sounds like you fit similar to me where you can go TTS in barrie lasted boot's and need to drop a 1/2 size in barrie lasted shoes.
In that case I would suggest keeping the size 7 as they should fit the same as Tassels boot.
By the way, welcome to the forum!
thanks for your quick reply!
Actually i asked the staff in tassels and they said somethings about welting. The 990 was built in 360welt ?(or storm welt?) and boot was built in 270welt hence make the 990 larger than boot.
What welting are the #44924HC? I dont have a clear concepts about welting.