Panasonic NNSG158S Genius Microwave OTR 1.0 Cu.ft.
Today
Typical price$546
Amazon: the cheapest today among the stores checked
Buy on AmazonPanasonic NNSG158S Genius Microwave OTR 1.0 Cu.ft. or Whirlpool MWF 421 SL microwave Countertop Combination microwave 25 L 800 W Black?
MWF 421 SL microwave Countertop Combination microwave 25 L 800 W Black costs $2 less today, across the stores checked.
Panasonic NNSG158S Genius Microwave OTR 1.0 Cu.ft. is the cheaperWhirlpool MWF 421 SL microwave Countertop Combination microwave 25 L 800 W Black is $2 the cheaper
The comparison in detail
Whirlpool MWF 421 SL microwave Countertop Combination microwave 25 L 800 W Black
Today
Typical price$544
Amazon: the cheapest today among the stores checked
Buy on AmazonAffiliate links: if you buy, the store pays us a commission at no cost to you.
Both prices over the last 30 days
NNSG158S Genius Microwave OTR 1.0 Cu.ft.MWF 421 SL microwave Countertop Combination microwave 25 L 800 W Black
First data point for one of the two: the chart appears as the days go by.
Still only a few days of data for both to read the trend; the chart fills in as the days go by.
Where is each one cheapest today?
Updated 07/11/2026
NNSG158S Genius Microwave OTR 1.0 Cu.ft.
- Amazon Lowest price$546Buy on Amazon
MWF 421 SL microwave Countertop Combination microwave 25 L 800 W Black
- Amazon Lowest price$544Buy on Amazon
Spec sheet side by side
| Item | NNSG158S Genius Microwave OTR 1.0 Cu.ft. | MWF 421 SL microwave Countertop Combination microwave 25 L 800 W Black |
|---|---|---|
| Specs | ||
| Type changes | Solo | With grill |
| Capacity changes | not listed | 25 L |
| General | ||
| Model changes | NNSG158S Genius Microwave OTR 1.0 Cu.ft. | MWF 421 SL microwave Countertop Combination microwave 25 L 800 W Black |
Other comparisons
NNSG158S Genius Microwave OTR 1.0 Cu.ft. orBreville the Combi Wave 3 in 1 Microwave Air Fryer Oven$530Compare- MWF 421 SL microwave Countertop Combination microwave 25 L 800 W Black orBreville the Combi Wave 3 in 1 Microwave Air Fryer Oven$530Compare
NNSG158S Genius Microwave OTR 1.0 Cu.ft. orGE GCST16S1WTS Microwave Oven$569Compare
MWF 421 SL microwave Countertop Combination microwave 25 L 800 W Black orGE JEM3072SHSS 0.7 Cu. Ft. Capacity 700 Watt Countertop Microwave Oven$523Compare
How we choose
Source: Catalog of partner stores, checked on 07/11/2026.
Lowest price seen for the product in the stores we read, on the day it was read, before sales tax. The model is the brand plus the name of the microwave; the versions go in the table. The price range, the median and the position use only models with a score; the price comparison looks at models whose score is within 0.5 points.
The spec score doesn’t measure how evenly it heats or durability, and the strong or weak point reading is just a comparison of numbers, not a buying recommendation.