Chainsaw Repair

Im really lost on this different fuel line and was hoping some of you guys would know the difference?  How I got started on this was I needed some of the .080 small line for a Sears weedeater the other day and came across a roll on ebay from China.  Its marked Tygon and a 60ft roll was $5.00 shipped.

Looking through what US Plastics offers there are 16 different kinds of fuel and oil tubing; 
 

I picked out a common size - 1/8 x 1/4. 
 1/8" ID x 1/4" OD x 1/16" Wall Vinyl Fuel and Oil Tubing is 30 cents a foot
 1/8"ID X 1/4"OD X 1/16" Wall Excelon Fuel and Oil is $16 for 25 ft or 64 cents
 1/8" ID x 1/4" OD x 1/16" Wall Tygon® Fuel and Lubricant Tubing is 79 cents
 1/8" ID x 1/4" OD Tygon® LP1100 Fuel Tubing is $1.00 a foot.

So, what the heck is the difference?  They are all yellow? Which one are you using and why?

Thanks Danny, I thought there was something around here but couldnt find it.  Im going to give the Stens true blue a try.