Single-thread speed dropped from 1003 in Celeron G470 to 554 in Celeron J1800 when it was replaced in early-2014 for the budget desktops. Which one would you take?Those were clocked very low though.
Even the G470 was only 2.0 Ghz (Sandy Bridge 1C/2T):
http://ark.intel.com/products/74390/Intel-Celeron-Processor-G470-1_5M-Cache-2_00-GHz