[SOLVED] R9 380 vs 1070/Ti

Hi,im just wondering is there a big difference between r9 380 4gb and 1070/Ti 8gb.
im planning on buying a 1070/ti in like a year or two so im just wondering will it make a huge difference.

PC:
-currently have i3-3240,buying i7-3770 after 28. June
-2x8gb ddr3 1333mhz
-lenovo ih61m
-chieftec elp-700s 700W
-1tb hhd+250gb ssd
-raidmax neon rgb