Hey there, @mrredrock25!
It really depends on your purpose for upgrading your storage with either the WD Blue or the WD Black.
It is a fact that the 1 TB 7,200 RPM model of both HDDs overlap in specs, but when put side-by-side, the WD Black should outperform the WD Blue, since the Black is tuned for performance.
The WD Blue is part of our mainstream PC storage solutions. If you want to upgrade your secondary storage for everyday computing, then this drive will surely give you the desired performance & reliability. It also comes with a 3-year limited warranty.
The WD Black , as I already mentioned, is our performance drive. It incorporates a dual-core processor which allows it to maximize the drive's performance when compared to standard single-core processing drives. It's a great solution if you are a high-end gamer or using pretty demanding applications like video/audio editing software. It has a 5-year limited warranty that can definitely give some peace of mind.
Let me know if you have more questions.
SuperSoph_WD