I spent a few months in the "shipping business" (think something like Mail Boxes, ETC), and the differences are as such (from my perspective):
Fed-Ex Ground
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+ Less expensive, when shipping the same sized item, same weight, to the same location as UPS, usually by about $3 - $5.
+ Free FedEx Ground boxing supplies if needed
- Claims service. God forbid they ever damage or lose your package, b/c even WITH their insurance, it's nearly impossible to get them to resolve the claim. Horrible. So bad that I refuse to do business with them anymore - we had 3 simple claims, all were drawn out so long that they "expired"...ugh.
- Poor customer service/accountability. As many have mentioned, they often throw stuff on the doorstep and run. Same with pick-up service. We had them take a few UPS packages w/o checking...we got them back about a week later, which didn't make the customers too happy.
FedEx Express
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+ Leader in overnight shipping.
+ Less expensive than UPS for critical items.
- "Guarantee" policy is BS. They claim that if a package isn't delievered within a 30 minute time frame, you don't pay for the service...Yeah, right. Try getting it from them...
UPS Ground
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+ Good claim service. We had numerous packages that were lost in shipping, UPS owned up to the problem, sent settlement check within a few weeks.
+ Reliable pick-up service. They scan each item as they pick-it-up, which cuts down on errors (see FedEx ground fiasco).
+ Great reporting system/service. Their tracking and invoicing is top-notch.
- More expensive, usually.
- B/C they're larger, people tend to take "pot shots" at them - of course, the more you do something, the more likelihood there is for error...
UPS Express
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- Pricey
- Not as consistent as FedEx
+ It's UPS, so claims are processed better.
Lately, I've been using Airborne Express for my personal stuff, or the USPS. I've found that Priority Mail has been beating UPS 3-day service with some regularity. Although, if you ship anything with any size or weight, USPS is horrible... Consider:
20"x20"x10" box, 25lbs from DC to AR, insured for $400.00 -
USPS = $30.95
UPS Ground = $15.72
FedEx Ground = $11.85