LP-700 two compare changed, like the exhaust pipe engine noise why there is a difference

1 - white LP-700 first modified exhaust pipes, oil change (DLE-5W-60) Jay  vehicles.
2 - Yellow LP-700 last month came in the original oil, riders can understand why the row from the engine sound very different from the following videos. Lies in the oil quality is easy to use and does not work well. Polyol ester oil with original oil vary greatly