Stealth addresses only cover one element of privacy: the transactions that are sent to your receiving address ultimately look "dispersed" to an outsider examining the blockchain -- or in other words, the transactions being sent to your receiving address show as if they aren't going to one single address. This privacy component solves the issue of linkability.
The issue is, if somebody sends you coins, although it will be "unlinkable" on the blockchain (on the exterior), the sender still has the capability to track where you then decide to move the coins they have sent you (if ever), by identifying the outputs on the blockchain.
The other vital privacy feature that Monero uses, to mask those "outputs" (to stop a sender from being able to further track the coins they've sent you), are called "ring signatures," which solves the issue of traceability.
Moreover, Vertcoin does not hide the amounts being transacted, while Monero does with something called "confidential transactions."
If Vertcoin were a serious privacy contender, then it would have to give up some of its utility -- such as scaling -- for the sake of privacy.
Monero sets out to do a specific job, and it does it very well. Stealth addresses are only one device of many that are required to provide sufficient privacy. We can conclude that Vertcoin's "privacy" is a gimmick. There is no such thing as "partial privacy." If you are trying to stay private, you cannot have such glaring vulnerabilities as those of being able to have your coins tracked by the original sender, or not having the amounts being transacted concealed from the start.
These videos explain more about these technologies in a friendly way if you're interested:
https://www.youtube.com/channel/UCnjUpT9gGxyQ_lud7uKoTCg
Monero uses Stealth Addresses, Ring Signatures, RingCT and is improving even more their privacy assets with StringCT, Kovri, and other projects that are being researched/developed.
