The PG349Q model has a higher curvature than the CQ27G2U (1900R versus 1500R).

The height is different, but the PG349Q can be adjusted in height to match the height of the CQ27G2U.

The resolutions are the same on both units, but the screens are different.

The only thing to consider is the table on which the monitors are placed, if it has enough space for both monitors.

Apart from that, there is no reason why they should not fit next to each other.

Also, the performance of the PC/notebook needs to be considered if it can support both monitors with their resolution and refresh rate.