What is the difference between these two video card revisions?

[vasilevsergey199128902a5]

What is the difference between these two revisions of the video card, one has E in the name, what does this mean?
MSI GeForce RTX 4060 Ti Ventus 3X E 8G OC and MSI GeForce RTX 4060 Ti Ventus 3X 8G OC.

 

[badboy2k]

What is the significant difference between these two revisions of the video card, one has E in the name, what does this mean?
MSI GEFORCE RTX 4060 Ti VENTUS 3X E 8G OC and MSI GEFORCE RTX 4060 Ti VENTUS 3X 8G OC.

the E is to Designate the newer Revision of the card that has a bit more metal in the heatsync and some more thermal pads on some parts that where overheating a bit without active cooling

MSI GEFORCE RTX 4060 Ti VENTUS 3X 8G OC = 713g in Weight
MSI GEFORCE RTX 4060 Ti VENTUS 3X E 8G OC = 728g in Weight