There are many variables as to which would be better, but here are some things to think about. I am assuming that the main router and the AP/Bridge router has at
least 3 antennae/streams and preferably the main
or AP/Bridge router has four antennae/streams.
- In AP mode, connected directly to the main router and/or ISP with an Ethernet cable, and given that the laptop will be in the same room as the AP will guarantee the highest possible wireless connection. Note that 1 meter from the router or AP is much too close to be using a mobile device wirelessly with. The ideal is somewhere between 8 and 20 feet for modern routers/AP's, for maximum responsiveness and throughput.
- In Bridge mode, and given that the laptop will be connected via Ethernet to it, the router will likely have a much better and stable connection than almost any laptop can produce. The Ethernet connection will also give the notebook a much more responsive network experience, even though it is ultimately 'wirelessly' connected via the Bridge. This is because the hardware in the Bridge router is much better than a laptop can ever have.
- The final point you should be considering is how fast the ISP is right now and how fast it may become in the not so far future? If we are talking about 100Mbps ISP speeds or less, it almost doesn't matter how we connect things (depending on the actual environment, of course). If we're talking about Gbps ISP speeds, and the laptop is only a one or two antennae design, then the Bridge would most likely be the preferred option.
The final thing you can think about? You will need to experiment with any possible configuration possible in your network environment and client devices you have to
know which will be faster, or not.