Here is WSJ on some of the differences between Le Pen and Macron (re: FR election)
https://www.wsj.com/articles/french-election-puts-possibility-of-frexit-on-the-agenda-1487183427
"..... Mr. Macron’s hope must be that he doesn’t need to provide too much detail on his economic plans, given the way the center ground has opened up for him in the campaign, offering him a strong chance of making it to the second round. Mr. Macron may also be betting he can then go on to beat Ms. Le Pen because too many voters view her as divisive and a threat to democracy for her to win. But the risk for Mr. Macron is that under the spotlight of the campaign, even a cautious, detail-lite plan might be enough to frighten voters. Ms. Le Pen’s best chance might come if Mr. Macron were beaten into second place by Socialist candidate Benoît Hamon—a not impossible scenario, say some experienced French political observers. Faced with a choice between the hard left and hard right, it isn’t clear which way voters will jump."