Actually given that Snap-on MAc and Sealey ar all made in china nowadays. it probably isn't. and they probably are in the same league nowadays. Only advantage of buying snap on or mac. is:
delivered to ya door (if ya a spanner monkey)
And better warranty/returns than most other toolbox manufacturers. Oh and of course having the "label" is as important in a garage as it is on the high street.
Snap- on has there own Factory(tool boxes) in the US. And there a a couple of Tool box makers That have stayed in the US that do rebranded for others and tagged made in the USA. Not everything is made in China as you believe it is
Your views of thing are tainted at times.