1/2 Inch CSST vs 3/4 inch pipe for isolated 45 ft run from LNG Meter to 71000 total BTU stove?

Adding NG stove to existing service. Significant price difference in quotes. What risk do we take going with the smaller diameter CSST over the pipe? There will be four 90 degree turns over 45 foot run. No intention of connecting additional appliances. Could there be flow issues with the lower diameter CSST?