An Umra is an expiation for the sins committed between it and the next, and Hajj which is accepted will receive no other reward than Paradise.
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ الْعُمْرَةُ إِلَى الْعُمْرَةِ كَفَّارَةٌ لِمَا بَيْنَهُمَا وَالْحَجُّ الْمَبْرُورُ لَيْسَ لَهُ جَزَاءٌ إِلاَّ الْجَنَّةُ