I dont understand the discussion about reported in the miner and shown in the pool.
The Miner in the rig reports the hashrate of the rig and the pool calculates the hashrate out
of the sended found shares. And thats always a difference.

Mostly my hashrate at the pool is a bit higher than in the miner. 1%. But thats Luck etc.


Simplemining:
+---+-----+----+---+-----------+----------+----+-----+-----+-------------+
| ID GPU Temp Fan Speed Shares Core Mem Power Efficiency |
+---+-----+----+---+-----------+----------+----+-----+-----+-------------+
| 0 3070 52 C 0 % 62.15 MH/s 8934/0/17 1365 8100 112 W 554.87 KH/W |
| 1 3070 57 C 0 % 61.89 MH/s 8928/0/0 675 8100 120 W 515.78 KH/W |
| 2 3070 50 C 0 % 62.18 MH/s 9002/0/0 1395 8100 113 W 550.24 KH/W |
| 3 3070 50 C 0 % 61.80 MH/s 9038/0/0 660 8100 114 W 542.08 KH/W |
| 4 3070 49 C 0 % 62.20 MH/s 8983/0/0 1470 8100 120 W 518.33 KH/W |
| 5 3070 48 C 0 % 62.15 MH/s 8978/0/4 1305 8100 120 W 517.96 KH/W |
| 372.37 MH/s 53863/0/21 699 W 532.71 KH/W |
+---+-----+----+---+-----------+----------+----+-----+-----+-------------+

2Miners:    Current             Average
3070-2   421.77 MH/s   386.75 MH/s


Simplemining:
+---+-----+----+---+-----------+----------+----+-----+-----+-------------+
| ID GPU Temp Fan Speed Shares Core Mem Power Efficiency |
+---+-----+----+---+-----------+----------+----+-----+-----+-------------+
| 0 1080 70 C 0 % 29.26 MH/s 2158/0/0 1594 4519 104 W 281.37 KH/W |
| 1 1080 72 C 0 % 29.65 MH/s 2191/0/0 1607 4519 104 W 285.07 KH/W |
| 2 1080 70 C 0 % 29.15 MH/s 2108/0/0 1582 4519 104 W 280.26 KH/W |
| 3 1080 66 C 0 % 29.91 MH/s 2222/0/0 1620 4519 104 W 287.57 KH/W |
| 4 1080 65 C 0 % 29.26 MH/s 2165/0/0 1582 4519 104 W 281.39 KH/W |
| 5 1080 67 C 0 % 29.90 MH/s 2175/0/0 1632 4519 104 W 287.52 KH/W |
| 6 1080 69 C 0 % 29.85 MH/s 2211/0/0 1607 4519 104 W 287.01 KH/W |
| 7 1080 69 C 0 % 29.87 MH/s 2232/0/0 1632 4519 104 W 287.22 KH/W |
| 236.85 MH/s 17462/0/0 832 W 284.68 KH/W |
+---+-----+----+---+-----------+----------+----+-----+-----+-------------+

2Miners:    Current             Average
1080-1   281.18 MH/s   240.44 MH/s


2Miners FAQ:

My hashrate is lower than in the miner
Since you start to mine your hashrate grows gradually. Please wait. The pool determines your hashrate based on the amount of shares sent by your mining rigs (workers). This value could be a little bit different from reported hashrate (in your mining software).