For their chains and cassettes, the first two numbers indicate the drivetrain speeds, and the last two indicate pricepoint. 10 is their lowest end, 30 is pretty low end, 50 or 70 is around the mid end, 90 is real fancy. For cassettes this pretty much exclusively effects weight and aesthetics, and they shift as well up and down the line and are cross compatible (the better chains, for example do last longer in 3rd party tests, though the price/performance ratio varies). There's not really a distinction between 1x and 2x cassettes--11-36 would be used on some 1x road/cx setups, and would otherwise be used on 2x MTB setups. All 11 speed cassettes have essentially the same spacing, but in some cases matching cassette and chain brands arguably ensures more consistent performance and is unsurprisingly what manufacturers (except of 3rd party chains) recommend.
Basically just get another 1130 cassette if you're not too fussed about weight. If you are, probably 1170 is what you want without breaking the bank.