Bt omega effective range, accurracy range and air efficiency?

i want to buy either a bt omega or a spyder mr4. im going to try and make whatever one i buy into a sniper. therefore i need to know which gun shoots longer and more accurate. I would also like to know how many shots i can get. i know the mr4 shoots 200 ft for an effective range and 150 for accurate range and up to 1800 paint per 20 oz tank. but i cant find any info on the bt omega. please help me