Assuming everything else is the same (PSI, flow, irrigation time, etc.) I would say "no" because the 50-footer would simply distribute the same amount of incoming water over a longer distance. However, the article I linked to below states:

"Fruit trees with roughly 5- to 10-foot canopies probably could be served with a 25-foot-long soaker. A larger specimen... may need 75 to 100 feet or more."

This implies that the longer the soaker hose, the greater the water output. Is this correct? (Any hydrologists out there?) Also, this author wrote:

"... remove the plastic plate with the pin-hole-sized opening at the bib end. Leaving it will prevent the hose from filling and the connection to the hose may explode from the pressure."

Everything I've read says to keep the plastic plate in, to prevent the SOAKER hose from exploding.

Confused...

Here is a link that might be useful: Soaker hoses, the poor man's drip system