For general throwing, I "guess" they'll be OK, but don't be surprised when the break - stainless steel is NOT the preferred steel for throwing knives.
Also, the "cheapie" knives off fleabay and amazon are USUALLY NOT tempered properly for throwing, which is why a lot of them, stainless or not, end up breaking. Throwing knives should be tempered down into the upper 40s up to the mid 50s max so that they have more flex to them so that stress from hitting the target round is spread out more.
My recommendation is never buy multiple sets of a throwing knife model until after you have thrown the first set a whole bunch to see if you really like the way they throw. Many of us have bought hundreds of knives only to resell them at a reduced price to get rid of them or flat gave them away to someone to try.
Some questions you have to ask yourself, re: throwing knives are:
1 - What style of knife throwing are you interested in?? No-spin, rotation, mountain man, ????? Each style of throwing has it's own criteria for throwing, some knives that throw nicely in no-spin styles really suck for rotational style and vice versa.
2 - Are you wanting to go throw in competitions or are you just gonna putz around in your back yard? Different throwing organizations have different specs, re: knife length, weight, edges etc. IKTHOF, AKTA, MM in the US, European and Asian countries have their own rules.
As an example, the knives you reference would be fine for back yard putzing but would be deemed illegal (not meeting the rules specifications) for IKTHOF rotational throwing - minimum 12"/minimum 12 oz. They are right at the bare minimum for IKTHOF no-spin length. They also don't meet the specs for mountain man throwing - re: profile/length.
For no-spin throwing, I would NOT like that knife profile - the spine is too curvy. An exception might be made if you chose to throw them "unconventionally" and let you forefinger ride down the blade flat rather than the spine, which is more typical.
3 - Where will you be throwing? Outside in your back yard? In your basement? Across your living room and down the hall in your apartment? I'm serious - there are people who have indoor ranges as they can only throw inside their homes or apartments due to local laws.