LiqPay has higher level of secure. To steal money from your LiqPay account, need to steal your cell phone. LiqPay works with all countries of world. See some articles about LiqPay http://exchange24x7.livejournal.com/
paypal is still the most accepted, you would have to get your customers to trust liqpay. i have found this i bit difficult as not enough people have heard of this company yet.
Paypal still is the main player in the world. Others are coming, but will not catch up for quite some time. I see moneybookers giving some run, but alertpay seems to match most to paypal. Liqpay just sounds weird to me. I dont know anything about them scamming or anything, but sometime the true and trusted are the best to with.
Never heard about this company. But their are a lot of clone paypal sites. But most seem to be rather limited and not enough people use it to be worth it. In addition I wouldn't trust my information with just any company.