It does seem odd if you used the same test sketch on both units that you get different values here:
That test was not anyway intended to transmit any data over the radio, just to test the communication between a MCU and the NRF24L01 radio unit.
Try the test code for a transmitter and receiver pair in post #2 in this thread. Simple nRF24L01+ 2.4GHz transceiver demo
As I implied before in post #7, your use of noInterrupts() is a likely culprit. This statement has wide ranging side effects. For example at least the millis() timer, SPI and Serial, which you are using, will all be affected.