I've used both type of adapters, and their suitability depends as much on my typical use of the camera or meter they are used in as it does of the characteristics of the batteries.
If I use a camera or meter regularly, and outside a studio, I prefer an adapter that works with the more expensive and slightly harder to purchase long lived batteries.
If I use a camera or meter episodically, or almost always close to home, the adapters that work with the cheaper and much easier to purchase shorter lived (hearing aid) batteries work great.
For clarity, if a camera requires the voltage that the mercury cells offered, an adapter that works with the hearing aid batteries will supply that voltage, but if you use a silver oxide cell in that adapter, the voltage will be wrong - one needs instead an adapter that converts the voltage to the target amount.