im trying to decide between the insulated and non-insulated how much of a difference is it and will it effect the size at all if thats not a stupid question im looking at a size L

Tech Specs:

Material:

[Shell] mini twill polyester; [Lining] polyester 

Insulation:

Yes 

Waterproof Rating:

10K 

Breathable Rating:

10000g 

Core Venting:

Underarm zips 

Pockets:

2 Front, 1 chest, all waterproof 

Seam Taped:

Yes, fully 

Powder Skirt:

Not specified 

Wrist Gaiters:

No 

Hood:

Yes 

Zip-in Compatibility:

No 

Recommended Use:

Cold weather skiiing, snow sports 

Manufacturer Warranty:

1 Year 

Country of Origin:

Anguilla Islands